Good news for what's likely to be a whole crapton of users: CyanogenMod, Android's most popular ROM, will be coming to a handful of new devices with CM6.1. Namely:
There will also be support for a few new devices- Acer Liquid, HTC Wildfire and Samsung Vibrant. My eye is also on the new HTC phones that are about to get released like the G2.
It looks like their doors are still open to new devs and currently unsupported devices, as well - to quote Cyanogen once more:
A lot of people ask me about adding support for their phone, but we can only support phones that we actually own.